Usability Evaluation and Satisfaction S urvey of a Visual A ssistive D evice for Preventing Pedal Confusion in Middle-Aged and Older Drivers

Objective : This study aims to evaluate the usability and satisfaction of a visual driving assistive device developed to prevent pedal confusion among middle-aged and older drivers and to verify its effectiveness in promoting a safer driving environment. Methods : From July to October 2024, usability and satisfaction evaluations were conducted with 15 middle- aged and older drivers and 15 occupational therapists. Participants assessed the device's usefulness, convenience, and intuitiveness through surveys, and provided suggestions for improvement. The System Usability Scale (SUS) was used for usability evaluation, while satisfaction was assessed using the Quebec User Evaluation of Satisfaction with assistive Technology (QUEST). Results : The results showed that the visual driving assistive device effectively reduced pedal confusion and improved drivers’ psychological stability and confidence. The usability evaluation revealed a high average SUS score of 85, indicating strong usability. The satisfaction survey also showed positive evaluations regarding the device's usefulness and effectiveness in the QUEST items. Conclusion : This study confirmed that the visual driving assistive device enhances the safety of older drivers and effectively prevents pedal confusion during driving. Future studies should focus on incorporating user feedback for functional improvements and verifying the device’s long-term effectiveness through real-world driving scenarios.